1/4x+2=-4 how do you do this step by step?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?